nside_to_level

astropy_healpix.nside_to_level(nside)[source]

Find the HEALPix level for a given nside.

This is given by level = log2(nside).

This function is the inverse of level_to_nside.

Parameters:
nsideint

The number of pixels on the side of one of the 12 ‘top-level’ HEALPix tiles. Must be a power of two.

Returns:
levelint

The level of the HEALPix cells